Andy Lutomirski | 7b956f0 | 2015-10-05 17:47:57 -0700 | [diff] [blame] | 1 | #ifndef _ASM_X86_DWARF2_H |
| 2 | #define _ASM_X86_DWARF2_H |
| 3 | |
| 4 | #ifndef __ASSEMBLY__ |
| 5 | #warning "asm/dwarf2.h should be only included in pure assembly files" |
| 6 | #endif |
| 7 | |
| 8 | /* |
| 9 | * Macros for dwarf2 CFI unwind table entries. |
| 10 | * See "as.info" for details on these pseudo ops. Unfortunately |
| 11 | * they are only supported in very new binutils, so define them |
| 12 | * away for older version. |
| 13 | */ |
| 14 | |
| 15 | #ifdef CONFIG_AS_CFI |
| 16 | |
| 17 | #define CFI_STARTPROC .cfi_startproc |
| 18 | #define CFI_ENDPROC .cfi_endproc |
| 19 | #define CFI_DEF_CFA .cfi_def_cfa |
| 20 | #define CFI_DEF_CFA_REGISTER .cfi_def_cfa_register |
| 21 | #define CFI_DEF_CFA_OFFSET .cfi_def_cfa_offset |
| 22 | #define CFI_ADJUST_CFA_OFFSET .cfi_adjust_cfa_offset |
| 23 | #define CFI_OFFSET .cfi_offset |
| 24 | #define CFI_REL_OFFSET .cfi_rel_offset |
| 25 | #define CFI_REGISTER .cfi_register |
| 26 | #define CFI_RESTORE .cfi_restore |
| 27 | #define CFI_REMEMBER_STATE .cfi_remember_state |
| 28 | #define CFI_RESTORE_STATE .cfi_restore_state |
| 29 | #define CFI_UNDEFINED .cfi_undefined |
| 30 | #define CFI_ESCAPE .cfi_escape |
| 31 | |
| 32 | #ifdef CONFIG_AS_CFI_SIGNAL_FRAME |
| 33 | #define CFI_SIGNAL_FRAME .cfi_signal_frame |
| 34 | #else |
| 35 | #define CFI_SIGNAL_FRAME |
| 36 | #endif |
| 37 | |
| 38 | #if defined(CONFIG_AS_CFI_SECTIONS) && defined(__ASSEMBLY__) |
Andy Lutomirski | f24f910 | 2015-10-05 17:47:58 -0700 | [diff] [blame] | 39 | #ifndef BUILD_VDSO |
Andy Lutomirski | 7b956f0 | 2015-10-05 17:47:57 -0700 | [diff] [blame] | 40 | /* |
| 41 | * Emit CFI data in .debug_frame sections, not .eh_frame sections. |
| 42 | * The latter we currently just discard since we don't do DWARF |
| 43 | * unwinding at runtime. So only the offline DWARF information is |
Andy Lutomirski | f24f910 | 2015-10-05 17:47:58 -0700 | [diff] [blame] | 44 | * useful to anyone. Note we should not use this directive if |
| 45 | * vmlinux.lds.S gets changed so it doesn't discard .eh_frame. |
Andy Lutomirski | 7b956f0 | 2015-10-05 17:47:57 -0700 | [diff] [blame] | 46 | */ |
| 47 | .cfi_sections .debug_frame |
Andy Lutomirski | f24f910 | 2015-10-05 17:47:58 -0700 | [diff] [blame] | 48 | #else |
| 49 | /* |
| 50 | * For the vDSO, emit both runtime unwind information and debug |
| 51 | * symbols for the .dbg file. |
| 52 | */ |
| 53 | .cfi_sections .eh_frame, .debug_frame |
| 54 | #endif |
Andy Lutomirski | 7b956f0 | 2015-10-05 17:47:57 -0700 | [diff] [blame] | 55 | #endif |
| 56 | |
| 57 | #else |
| 58 | |
| 59 | /* |
| 60 | * Due to the structure of pre-exisiting code, don't use assembler line |
| 61 | * comment character # to ignore the arguments. Instead, use a dummy macro. |
| 62 | */ |
| 63 | .macro cfi_ignore a=0, b=0, c=0, d=0 |
| 64 | .endm |
| 65 | |
| 66 | #define CFI_STARTPROC cfi_ignore |
| 67 | #define CFI_ENDPROC cfi_ignore |
| 68 | #define CFI_DEF_CFA cfi_ignore |
| 69 | #define CFI_DEF_CFA_REGISTER cfi_ignore |
| 70 | #define CFI_DEF_CFA_OFFSET cfi_ignore |
| 71 | #define CFI_ADJUST_CFA_OFFSET cfi_ignore |
| 72 | #define CFI_OFFSET cfi_ignore |
| 73 | #define CFI_REL_OFFSET cfi_ignore |
| 74 | #define CFI_REGISTER cfi_ignore |
| 75 | #define CFI_RESTORE cfi_ignore |
| 76 | #define CFI_REMEMBER_STATE cfi_ignore |
| 77 | #define CFI_RESTORE_STATE cfi_ignore |
| 78 | #define CFI_UNDEFINED cfi_ignore |
| 79 | #define CFI_ESCAPE cfi_ignore |
| 80 | #define CFI_SIGNAL_FRAME cfi_ignore |
| 81 | |
| 82 | #endif |
| 83 | |
Andy Lutomirski | 7b956f0 | 2015-10-05 17:47:57 -0700 | [diff] [blame] | 84 | #endif /* _ASM_X86_DWARF2_H */ |